2007 Florida Division of Emergency Management (FDEM) Lidar Project: Eastern Indian
River County

This kmz file shows the extent of coverage for the 2007 Indian River County, FL lidar
data set.

This Light Detection and Ranging (LiDAR) LAS dataset is a topographic survey conducted
for a coalition of GIS practitioners, including the Florida Division of Emergency
Management (FDEM), Florida Water Management Districts, Florida Fish and Wildlife Conservation
Commission, Florida Department of Environmental Protection, Army Corps of Engineers
Jacksonville District, and other state and federal agencies. The goal for this project
is to use the LiDAR data as new elevation inputs for updated SLOSH data grids. The
ultimate result is the update of the Regional Hurricane Evacuation Studies (RHES)
for the state. The State of Florida Division of Emergency Management LiDAR Survey
was collected under the guidance of a Professional Mapper/Surveyor. Data were collected
for 255 square miles in the eastern portion of Indian River County, Florida from August
24 - 28, 2007. This is a classified lidar data set. The data are classified: 1 = Unclassified,
2 = Ground (Bare Earth), 7 = Noise, 9 = Water and 12 = Overlap. The data was collected
at a maximum post spacing of 4 feet in unobscured areas for random point data.

DOC/NOAA/NOS/OCM > Office for Coastal Management, National Ocean Service, National
Oceanic and Atmospheric Administration, U.S. Department of Commerce

Point of Contact

Florida Division of Emergency Management (FDEM)850-413-9969

Associated Resources

Lidar Dataset Supplemental Information

Originator

DOC/NOAA/NOS/OCM > Office for Coastal Management, National Ocean Service, National
Oceanic and Atmospheric Administration, U.S. Department of Commerce

Originator

Florida Division of Emergency Management (FDEM)

Publisher

DOC/NOAA/NOS/OCM > Office for Coastal Management, National Ocean Service, National
Oceanic and Atmospheric Administration, U.S. Department of Commerce

Date(s)

publication: 2008-01-01

Data Presentation Form:

Digital image

Dataset Progress Status

Complete

Data Update Frequency:

As needed

Purpose:

The LiDAR topographic mapping survey is to support the Florida Division of Emergency
Management (FDEM) development and maintenance of Regional Hurricane Evacuations Studies
(RHES), which include vulnerability assessments, and to assist disaster response personnel
in understanding the threats to Florida's citizens and visitors. Additional intended
uses for this survey are growth management, map modernization/floodplain mapping,
natural lands stewardship, and homeland security planning.

Use Limitations

These data depict the elevations at the time of the survey and are only accurate for
that time. Users should be aware that temporal changes may have occurred
since this data set was collected and some parts of this data may no longer represent
actual surface conditions. Users should not use this data for critical
applications without a full awareness of its limitations. Any conclusions drawn
from analysis of this information are not the responsibility of NOAA or any of its
partners. These data are NOT to be used for navigational purposes.

Time Period:

2007-08-24 to 2007-08-28

Spatial Reference System:

urn:ogc:def:crs:EPSG::4269 Ellipsoid in Meters

Spatial Bounding Box Coordinates:

N: 27.867889

S: 27.550789

E: -80.309070

W: -80.617170

Spatial Coverage Map:

Themes

Bathymetry/Topography

Photogrammetry

Terrain

Stereo Model

Contours

LiDAR

Hydrology

DEM

Places

United States

Florida

Indian River County

Use Constraints

No constraint information available

Fees

Fee information not available.

Source Datasets

State of Florida Division of Emergency Management LiDAR Project Survey

Description of Source: Source Contribution: The LiDAR Project Survey was acquired for the Florida Division
of Emergency Management and processed by Woolpert Inc. To collect the breaklines the
LiDAR data was used as the main source data set in addition to orthophotography. Orthophoto
imagery was from new imagery collected and developed by the Woolpert Team. All imagery
for Indian River County is dated 2007 with a 0.5 foot pixel resolution. Source Type:
disc

Temporal extent used:
unknown to

Lineage Statement

Lineage statement not available.

Processor

Woolpert, Inc.

DOC/NOAA/NOS/OCM > Office for Coastal Management, National Ocean Service, National
Oceanic and Atmospheric Administration, U.S. Department of Commerce

LiDAR was collected within portions of Indian River County. System Parameters/Flight
Plan: The LiDAR system acquisition parameters were developed based on a maximum average
ground sample distance of 4 feet. Two Leica ALS50 sensors were used for acquisition.
Acquisition specifications for the two sensors were as follows: Sensor 19 Field of
View (full angle) - 29 degrees Nominal flight altitude (AMSL) - 3999.30 feet Airspeed
- 54.02 meters/sec Laser pulse rate - 75,000 Hz Nominal swath width (on ground) -
2068.58 feet Maximum cross track point spacing - 3.91 feet Maximum along track point
spacing - 3.94 feet Average point spacing - 2.21 feet Flight line spacing - 1544.95
feet Side overlap - 25.31%. Sensor 59 Field of View (full angle) - 29 degrees Nominal
flight altitude (AMSL) - 3999.30 feet Airspeed - 60.70 meters/sec Laser pulse rate
- 84,400 Hz Nominal swath width (on ground) - 2068.58 feet Maximum cross track point
spacing - 3.94 feet Maximum along track point spacing - 3.91 feet Average point spacing
- 2.21 feet Flight line spacing - 1413.72 feet Side overlap - 31.66%. LiDAR System
Calibration: Prior to the LiDAR acquisition, the system underwent a calibration to
verify the operational accuracy and misalignment angles. Boresight calibrations were
performed for each LiDAR system at the beginning and end of each flight mission. LiDAR
Data Acquisition: LiDAR data acquisition only occurred when the sky was sufficiently
clear of clouds, smoke, and atmospheric haze. The LiDAR data was processed immediately
after the acquisition to verify the coverage had no voids. GPS/Inertial Measurement
Unit (IMU) Post Processing: The GPS and IMU data was post processed using differential
and Kalman filter algorithms to derive a best estimate of trajectory. The quality
of the solution was verified to be consistent with the accuracy requirements of the
project. LiDAR Processing and Classification: The LiDAR data was post processed and
verified to be consistent with the project requirements in terms of post spacing and
absence of artifacts. The point cloud underwent classification to determine bare-earth
points (class 2), noise points (class 7), water returns (class 9), and unclassified
data (class 1). Class 12 contains LiDAR points removed from the overlap region between
adjacent flight lines.

The NOAA Coastal Services Center (CSC) received files in LAS format. The files contained
LiDAR intensity and elevation measurements. CSC performed the following processing
on the data to make it available within Digital Coast: 1. The data were converted
from State Plane Florida East coordinates to geographic coordinates. 2. The data were
converted from NAVD88 heights to ellipsoid heights using Geoid03. 3. The LAS header
fields were sorted by latitude and updated.

The NOAA National Geophysical Data Center (NGDC) received lidar data files via ftp
transfer from the NOAA Coastal Services Center. The data are
currently being served via NOAA CSC Digital Coast at http://www.csc.noaa.gov/digitalcoast/.
The data can be used to re-populate the system. The data are archived in LAS
or LAZ format. The LAS format is an industry standard for LiDAR data developed by
the American Society of Photogrammetry and Remote Sensing (ASPRS); LAZ is a loseless
compressed version of LAS developed by Martin Isenburg (http://www.laszip.org/). The
data are exclusively in geographic coordinates (either NAD83 or ITRF94). The data
are referenced vertically to the ellipsoid (either GRS80 or ITRF94), allowing for
the ability to apply the most up to date geoid model when transforming to orthometric
heights.